Mechanical movement



H. J. KUHLMAN.

MECHANICAL MOVEMENT.

APPLlCATlON FILED AUG. 9-, 1920.

1,412,183. Fig.1.

Patentd Apr. 11, 1922.

2 SHEETS-Sl-IEET I.

jnvni n KahZmar- 1H. J. KUHLMAN. MECHANICAL MOVEMENT. APPLICAUON FILED A063, 1920.

Patnted Apr. 11, 1922.

. 2 SHEETS-SHEET 2 jrzvenor;

U D STAT-.

HENRY J. Ku-H Maiv, OF'COLESBURG; Iowa 7 MnonANioAL a citizen of the United States of America, and a resident 'of' Colesburg, Delaware County, Iowa, have invented certain new 7 and useful Improvements in Mechanical Movements, of which the following is a 7 scale in Fig. 2.

- device looking away from the source of der 18.

specification;

My invention relates to. improvements in mechanical movements, and the objectof my improvement is to supply a power transmission device adapted to change rotary'to' reciprocating movement. 7

The devicehas for a particular object, the actuation of a reciprocating member to efiiciently vary successive parts of the power thrust thereof in one direction, as when employed in the operation of a singleacting reciprocating pump, or other mechanism in which load is moved in the power stroke of a reciprocation. i

The above object hasbeen successfully accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Fig. 'lis an elevation of the power, with parts removed or broken away. Fig. 2 is an elevation of the inner faces of one set of the gearings of said device and of the pitman, the dotted lines showing the positional relation of a pump-barrel and 7 its piston-rod to said mechanism. Fig. 3 is a top plan of the bracketed frame of the device, and Fig. 4 is an enlarged elevation ofthe connected pinions' shown on a smaller Similar numerals of reference denote corresponding parts throughout the several views. v V

The numeral 10 denotes a supporting" frame for the mechanism. of my device adapted to be removably. clamped upon a fixed body such as the hollow pump cylinhe frame 'lO'is formed at its forward end with a medial reentr'ant angle or clamping-member having laterally eXtend ing flanges 15, a clamping-member or counterpart 16 of similar shape has'like flanges, both pairs of flanges contacting'and orificed to receive boltlt' secured by nuts 17, where" by said members betightly secured about said cylinder. A reciprocatory pis v ton-rod '19 extends from without into the open upper end of said cylinder for actuat"- ing a piston (not shown) therein; A crossbar' 21 is rigidly secured on the upper MOVEMENT.

1920. Serial No. 402,187.

end of the piston-rod I9 b y means of: a

bolt20.y' n The-numeral 21 denotes a pair: of like pltmen, each having atopposite upper and lower ends bearing-eyes23and-25 respect ivelyto receivepivotally theiouterends of pins 22 and 26 which are fixed upon the) ends of "the cross-bar. 21 andeccentriCally and"adjustably upon the two stepped 'gears 34, the adjustmentradially upon said "gears? of the pins 26 being in'a'plurality of pinsockets 27; r The frame 10 has spaced horizontally disposed arms 1l,'and' has integral transverse tubular bearings- 12 and 18, in which arerespectively rotatably mounted to proj ect at both-ends therefrom, the rotatable shafts 8 and 9. A belt-wheel 28 is splined upon the medial part of the shaft 9fbetween the dlvlded. halves of the bearing member l3,

and carries a driving-belt 29,whichmay be drivenby means of anysuitable source of power,

. Upon the ends of the shaft -8 are splined like but reversedgear-wheels Upon the ends of the other shaft 9 are splined like but reversed sets. of abutting pinions '30, 31, 32 and 33. 7 L f Eachgearheel 3e isj formed with. sue? 1 r cessively offset. gear-segmentsl ,"2,*3 andf 1 1 The innermost gear segment' 4. is concentric:

withtheshaft "8.:1The opposite or outer v mostgear-segment '1' is eccentric, the other gear-segments 2"and 3' being also eccentri'c,=.

with all theircenters located in the radius I of. sa d gear-Wheel which terminates medially in the segment 1.. r r

The several geabsegments mentioned,

while stepped laterally relatively to each other in abutting segments, andhaving, dif-f.

ferent centers, nevertheless, meet 'or "coin j cide tangentially in a *tooth' common' to both the abutting segments, tl1at is, terminal teeth of abutting ends of segments are inf-"W tegrally connected and continuous across both segments 'as'shown in: Figs. l-andfla't 5, 6'and 7, wher'eQt-he segments land 2hafv'e common teeth 5; the segments'Z-and 3'l1 av'e common teethj6, and the segments 3 and a have common teeth 7 f R'eferring nowto- Fi'gs. 1, 2' and 4, will? i be obs'ervedthat-the sets of 'pinions are'e'ach contrived to fully coact regularly'atthe proper intervals with the said gearrseg ments which are individually relatedg'theree 3 to and positioned in 'the same"transaxial planes. Forinstance, the smallest pinion'j l i V '7 gear-segments 30 has half the number of teeth of and its halves mesh only with the like opposite gear-segments 2; the next larger pinion 32 has twice the number of teeth of and its halves mesh only with the like opposite gear-segments 3, while the largest pinion 33 has the same number of teeth as and meshes only with the single concentric gear-segment 4. The pinion 30 rotates twice while meshing with the gear-segment 1; the pinions 31 and 32 each rotate one-half a rotation while meshing with the respective gear-se ments 2 and 3, and the pinion 33 rotates once while meshing with the gearsegment 4.

It will also be noticed that the several pinions 30, 31 and 32 are similary eccentric with respect to the shaft 9, and mesh only with said eccentric-gear-segments 1, 2 and 3 respectively. while the'concentric pinion 33 meshes only with the concentric gearsegment 4:. The pinions rotate as one. and may be made integral, or may be detachably connected as they are more easily and cheaply made in the latter way. In either case, certain teeth of the abutting pinions coincide transversely to thus, in effect, produce common teeth extending. across both pinions. Thus, referring to Figs. 1 and 4, the teeth 35 and 36 are common to both pinions 30 and 31; the teeth 37 and 38 are common to both pinions 31 and 32,.while the teeth 39 and 40 are common to both pinions 32 and 33.

The lengths of the diflerent gear-segments and number of teeth thereon are operatively related to the circumferences and the number of teeth on the co-meshing pinions, and the common teeth of the abuttingpinions thus mesh with the common teeth of the appropriate gear-segments during each rotation, the transition of driving engagement being smoothly and effectively made from successive pinions to successive gear-scg ments.

The correlated driving-pinions and driven thus furnish means "for the speed and power of the pit men 24- on the upward or power stroke thereof. This varying of the speed of reciprocation of the pitmen is due to the decreasing or acceleration of the speed of rotation of the stepped gears while their .eccentric segments are driven by the eccentric pinions. This variation of the speed of rotation of the gears during one part of each rotation, moves the pitmen at the maximum stress part of the power-stroke cycle of their reciprocation at lowest speed, and this fits the mechanism for use with single-acting reciprocating pumps in the conversion of rotary into reciprocating movements. The concenrtic segments a of the gears 34 allow the idle return stroke of the pitmen to be at greater speed, while varying also affording means of transition between the eccentric segments 3 without abruptchange in the transition of the pinions from one segment to the other.

My improved gearing in slowing up the speed of movement of the pitman to a lowest speed at the point of greatest load stress and then accelerating the speed to the be ginning ot' the idle stroke, permits the employment of a prime motor supplying a maximum power of about one-half of that of a motor such as'is required when the ordinary circular pinion and gear are used. This is due to the said reduction or" speed to the lowest when the power stroke is at its maximum loading where all the power is used, instead or" there otherwise being a necessity for a doubled motive power to carry the pitman at high constant speed past this point of maximum loading.

It is to be understood that the number and relative arrangements of the pinions and inter-meshing gear-segments of my de-v vice may be varied to produce varied actions on the pitmen, without departing from the principles of the invention. 7

Having described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In combination, a rotatable gear-wheel composed of stepped segments in different transaxial planes, a rotatable driving-shaft, pinions fixed on said driving-shaft to intermesh with certain ofsaid stepped segments at certain stages of the rotation of said shaft, one segment of said gear-wheel be-.

ing eccentric with longest radius, the smallest of said pinions being eccentric on said shaft and intermeshing with said longest radius segment, like opposite eccentric pairs of said stepped segments being in the same transaxial plane, and others of said pinions of different and larger sizes than the tirstmcntioned pinion being eccentric on said shaft and intermeshing respectively with said like pairs of eccentric gear-segments, and a pitman terminally pivot-ally cOlHIECiIGCl to said gear-wheel at a location opposite and alincd rilian'ietrically with the medial radius oi the first-mentioned gear-,

segment.

2. In a device of the character described, a gear-wheel composed of eccentric segments stepped in different transaxial planes, a pitman pivotally connected to said gear-wheel.

a driving-shaft, and eccentric pinions fixed on said driving-shaft to intermesh in succesmom with said segments, to lmpart to said gear-whcel on the power-stroke imparted by,

it to said pitman increasing effort to the place of maximum load and decreasing eiiort from said place of maximum load.

Signed at ater-loo, Iowa, this 23rd day of July, 1920.v

HENRY J, KUHLMAN. 

